[INFO] fetching crate dark-std 0.2.16...
[INFO] checking dark-std-0.2.16 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate dark-std 0.2.16 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate dark-std 0.2.16 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dark-std 0.2.16
[INFO] finished tweaking crates.io crate dark-std 0.2.16
[INFO] tweaked toml for crates.io crate dark-std 0.2.16 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 59 packages to latest compatible versions
[INFO] [stderr]       Adding addr2line v0.22.0 (latest: v0.24.1)
[INFO] [stderr]       Adding gimli v0.29.0 (latest: v0.31.0)
[INFO] [stderr]       Adding hermit-abi v0.3.9 (latest: v0.4.0)
[INFO] [stderr]       Adding miniz_oxide v0.7.4 (latest: v0.8.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-sys v0.52.0 (latest: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da388c0eec200771c5174e56d257a473bec65ae32d9546bb3ea575fd7f1177d9
[INFO] running `Command { std: "docker" "start" "-a" "da388c0eec200771c5174e56d257a473bec65ae32d9546bb3ea575fd7f1177d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da388c0eec200771c5174e56d257a473bec65ae32d9546bb3ea575fd7f1177d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da388c0eec200771c5174e56d257a473bec65ae32d9546bb3ea575fd7f1177d9", kill_on_drop: false }`
[INFO] [stdout] da388c0eec200771c5174e56d257a473bec65ae32d9546bb3ea575fd7f1177d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37ccd72c92695a104b1d7e387f12082681e9dd0ea4c1e49cf043e69e8f62e3ff
[INFO] running `Command { std: "docker" "start" "-a" "37ccd72c92695a104b1d7e387f12082681e9dd0ea4c1e49cf043e69e8f62e3ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]     Checking flume v0.11.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-channel v0.5.13
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking tokio v1.40.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking indexmap v2.5.0
[INFO] [stderr]     Checking dark-std v0.2.16 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rev`
[INFO] [stdout]   --> benches/bench_rw_vec.rs:79:16
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let (send, rev) = crossbeam::channel::unbounded();
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_rev`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]   --> tests/btree.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |     assert_eq!(2, *g.deref());
[INFO] [stdout]    |                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `i32` does not implement `Deref`, so calling `deref` on `&i32` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.00s
[INFO] running `Command { std: "docker" "inspect" "37ccd72c92695a104b1d7e387f12082681e9dd0ea4c1e49cf043e69e8f62e3ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37ccd72c92695a104b1d7e387f12082681e9dd0ea4c1e49cf043e69e8f62e3ff", kill_on_drop: false }`
[INFO] [stdout] 37ccd72c92695a104b1d7e387f12082681e9dd0ea4c1e49cf043e69e8f62e3ff